Volume XL-8
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-8, 1095-1098, 2014
https://doi.org/10.5194/isprsarchives-XL-8-1095-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-8, 1095-1098, 2014
https://doi.org/10.5194/isprsarchives-XL-8-1095-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

  28 Nov 2014

28 Nov 2014

Epipolar Rectification for CARTOSAT-1 Stereo Images Using SIFT and RANSAC

A. Akilan, D. Sudheer Reddy, V. Nagasubramanian, P. V. Radhadevi, and G. Varadan A. Akilan et al.
  • Advanced Data Processing Research Institute, Dept. of Space, Manovikas Nagar P.O., Secunderabad 9, India

Keywords: Epi-polar rectification , image matching , SIFT, Ransac, Cartosat-1 stereo

Abstract. Cartosat-1 provides stereo images of spatial resolution 2.5 m with high fidelity of geometry. Stereo camera on the spacecraft has look angles of +26 degree and -5 degree respectively that yields effective along track stereo. Any DSM generation algorithm can use the stereo images for accurate 3D reconstruction and measurement of ground. Dense match points and pixel-wise matching are prerequisite in DSM generation to capture discontinuities and occlusions for accurate 3D modelling application. Epipolar image matching reduces the computational effort from two dimensional area searches to one dimensional. Thus, epipolar rectification is preferred as a pre-processing step for accurate DSM generation. In this paper we explore a method based on SIFT and RANSAC for epipolar rectification of cartosat-1 stereo images.